Elevator guide-shoe.



G. HATFIELD. ELEVATOR-GUIDE SHOE.

APPLICATION FILED DEO.16, 1909.

Patented Sept. 5, 1911.

WITNESSESr ATTORN EY CHRISTOPHER HATFIELD, OF NEW YORK, N. Y.

ELEVATOR GUIDE-SHOE.

Specification of Letters Patent.

Patented Sept. 5, 1911.

Application filed December 16, 1909. Serial No. 533,322.

To all whom it may concern:

Be it known that I, CHRISTOPHER HAT- FIELD, a citizen of the UnitedStates, and a resident of the borough of Brooklyn, in the county ofKings, city and State of New York, United States of America, haveinvented certain new and useful Improvements in Elevator Guide-Shoes, ofwhich the following is a specification.

My invention relates to guide shoes which are carried by elevator-cars,and are arranged to slide over the fixed guides as the car passes alongthem.

The object of my invention is to provide a shoeof this characterconstructed of a plurahty of parts which/are so arranged that such ofthe parts as become worn may be replaced without renewing the whole.This and other objects of my invention will appear in the followingspecification, in which I will describe my invention, and in theappended claims I will set forth its novel features.

Referring to the drawings, Figure 1 shows in side elevation that part ofan elevator-car which carries one of the guide shoes and a portion ,ofthe fixed guide over which the shoe runs. In Fig. 2 the same parts areshown in plan, the guide-rail being shown in section. Fig. 3 is aperspective view of a guide shoe made according to my invention, andFig. 4 is a sectional plan view of the shoe.

Like characters of reference designate corresponding parts in all of thefigures.

1O designates certain of the structural parts of an elevator-car. Aguide shoe frame or holder 11 is carried by these parts. It may beconnected with the car through the intermediary of a spring 12 whichprovides a limited amount of resiliency.

13 is the shoe-clamp, the purpose of which will be shown more fullyhereinafter.

14 is the guide-rail. These guide-rails are commonly constructedofT-rails of steel rigidly affixed toa building or other structure inwhich they are supported in a vertical position, although, of course, myinvention is applicable also to other forms of rails and to those whichare in other than vertical position. The present invention relates to ashoe which is held in the frame 11 and slides over these guide-rails. Inthe drawings, 20 designates the shoe which I have invented for the abovepurpose. In its preferred form this shoe comprises a back portion 21.and two sides 22, 22. The sides overlap the back portlon, but are cutaway as shown in the drawlngs at 23, to fit over lugs projecting fromthe back portion at these points. These lugs have undercut edges; thatis. they are narrower in the rear than they are in front. and theopenings in the side pieces are made to fit over them. In other words.dovetail joints are provided between the back portion and the sideswhich hold these parts rigidly together to form a unit. These joints areso made that the sides may be removed from the back portion in only onedirection. side- Wise. These shoes may be made of different materials,such as bronze, or softer metal. fiber, or wood. I prefer to constructthem of hard wood thoroughly permeated with oil or other lubricant. Thesurfaces of each member of the shoe which are adjacent to the guide aregouged out as at 2% so that little pockets are formed thereby betweenthe shoe and the guide for the accumulatimi of lubricant.

The operation of this device is obvious. The shoe is placed in theholder 11 when the clamp 13 is removed. The clamp is then replaced andsecurely holds the shoe in place. This is common practice, but in thepresent invention it may be seen that the shoe holder notonly holds theshoe in the desired position, but that it also holds the parts thereoftogether as the holder prevents sidewise movement of the shoe, andbecause of the dovetail joints between the parts of the shoe, this holdsthe side pieces onto the back portion of the shoe.

It is found in practice that in nearly every case the wear on theelevator guide shoes is uneven, and that it becomes worn on oneparticular part more than on another. One

of the objects of this invention is to provide means for replacing aworn part without disturbing the other parts. It may be seen that eitheror both of the side pieces may be removed or replaced, or that the backportion may be removed without discarding the sides. The dovetail jointsare also made alike' and set symmetrically in relation to the backportion so that either side piece may be removed and turned around to empose its other side to the rail.

The guide rails are usually lubricated with grease which reduces thefriction between the rail and the shoe, but when the shoes areconstructed of wood permeated with lubricant, there is but littlefriction between these parts even if the guides are not properlylubricated. When these shoes are used it is apparent that repairs may bequickly made and that the cost of maintenance is.

materially reduced.

\Vhat I claim is.

1. An elevator guide shoe comprising a back portion having lugs withundercut edges projecting from the sides thereof, and side piecesoverlapping said back portion, saidside pieces being provided withflaring grooves adapted to fit over said lugs, said back portion andside pieces being constructed with lubricant pockets cut in theirbearing surfaces.

2. An elevator guide shoe comprising a back portion having a pair oflugs with undercut edges projecting from the sides thereof, and sidepieces overlapping said back portion, said side pieces being providedwith flaring grooves adapted to fit over said lugs, said back portionand side pieces being constructed of wood permeated with lubricant andconstructed with lubricant pockets cut in their bearing surfaces.

3. An elevator guide comprising a frame adapted to be connected with acar, and a three-piece shoe of wood permeated with lubricant and havinglubricant pockets cut in the bearing surfaces thereof, said frame havingmeans for holding the pieces of the shoe in two directions, and saidpieces being constructed with joints between them arranged to hold saidpieces together in a third direction.

4. An elevator guide comprising a frame adapted to be connected with acar, and a shoe comprising a back portion having lugs with undercutedges projecting from the sides thereof and side pieces overlapping saidback portion, said side pieces being provided with flaring groovesadapted to fit over said lugs to hold said pieces together in onedirection; said frame having means for holding the pieces of the shoetogether in other directions.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

CHRISTQPHER HATFIELD.

